Heel-nailing machine.



H. HALL.

HEEL NAILING MACHINE.

APPLICATION FILED JULY 24.1909. 1 1 1 9 822, Patented Dec. 8, 1914.

2 SHEETS-SHEET 1.

THE RRRR I5 PETERS CO. FHDTO-LITHO. WASHINGTON D C.

H. HALL.

HEEL MAILING MACHINE.

APPLIUATION FILED JULY 24. 1909.

1 ,1 1 9,822. Patente'd Dec. 8, 1914.

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srant i arnnr ornion.

HARRY HALL, OF LEICESTER, ENGLAND, ASSIGNOR TO UNITED SHOE MACHINERY COMPANY, OF PATERSON, NEW JERSEY, A CORPORATION OF NEW JERSEY..

HEEL-NAILING MACHINE.

Specification of Letters latent.

Patented Dec. 8, 1914.

Application filed July 24, 1909. Serial No. 509,334.

T 0 all 2071 am it may concern Be it known that I, HARRY HALL, a subject of the King of England, residing at Leicester, in the county of Leicester, Eng-l land, have invented certain Improvements in Heel-Nailing Machines, of which the following description, in connection with the accompanying drawings, is a specification, like reference characters on the drawings indicating like parts in the several figures.

This invention relates to heel nailing machies and more particularly to a machine of the type in which a nail block is mounted for movement between a nail receiving position and a nail driving position in which it lies beneath a support upon which the work is positioned.

In machines of this type the work is commonly clamped between a presser member and a plate having nail passages formed therein and the conduits of the nail block are arranged in axial alinement with said passages in the nail driving position of the nail block in order that the nails may be driven through the plate into the work. To insure the accurate guiding of the nails substantially throughout their entire movement into the work the passages in the supporting plate have previously been formed of substantiallv the same size as the conduits in the nail block. This construction while insuring the accurate guiding of the nails i into the work hilSullOVQVll'. been open to a number of practical obiections. For example, the narts of the machine had to be very carefully formed and adjusted to insure that in the nail driving position of the nail block the conduits of the latter would be in exact actual alinement with the nail passages in the supporting plate. More over after the machine had been used for anv length of time there was always liability of the parts becoming so worn that the nail drivers within the conduits in the nail block would strike the work supportingtplate in their upward movement and thus cause breakage of the parts of the machine.

An object of the present invention is to provide a heel nailing machine of the above class which shall be free from the objections previously mentioned.

WVith this object in view the present invention contemplates the provision in a heel a presser member and a nail block arranged for relative approaching movement to subjectthe work to clamping pressure, of a yielding member for supporting the work while it is being centered or positioned, arranged between the presser member and nail block in close proximity to the latter. With this arrangement in the relative approachmg movement of the presser member and nail block the yielding work support serves merely to transmit the clamping pressure from these parts to the work, the yielding support itself being maintained in operative position by engagement with the rigid nail block. Accordingly the work support may be made so thin that no appreciable distance will exist between the top of the nail block and the work upon the work support.

\Vith this construction the nail conduits in the nail block serve to guide the nails substantially throughout their entire movement into the work so that the nail passages in the work support may be made larger than the said conduits without interfering with the guiding of the nails. By having the passages in the work support larger than the conduits in the nail block less accuracy is required in assembling the parts of the machinethan would otherwise be the case and liabilitv of the nail drivers striking the lift support is removed.

Other features of the present invention will be hereinafter described in the specification and pointedout in the claims.

In the drawingS.--

Figure 1 is a. view in vertical section of a portion of a heel building machine showmg one embodiment of the present invenr tion applied thereto; Fig. 2 is a plan view of the parts of the machine shown in Fig. 1, a portion of the heel upon the lift support being removed to show the construction.

One embodiment of the present invention is herein shown applied to a heel build- J ing machine having a lift support provided with suitable means for assembling the lifts thereon and a nail block having contained drivers mounted for movement between a nail receiving position and a position beneath the lift support, in which nails may be driven into the lifts assembled upon the support, similar to that shown in the British Patentto William R.- Barclay and Arthur Bates No. 24,545/06: a

Referring to the drawings, 2 designates the nail block, having contained drivers 4, which is mounted for movement in a horizontal plane between a nail receiving position and a nail driving position beneath the lift support 6. To this end the nail block is carried upon. the end of a horizonal arm 8 pivotally mounted upon a vertical stud 10 carried by the frame of the machine, the arrangement being such that the arm can be swung about the stud 10 as a vivot to move the nail block from a nail receiving position to a nail driving position beneath the lift support 6. The machine is also provided with a presser head 12 which is mounted for movement into and out of a position in which it bears upon the lifts assembled upon the lift support in order that it may clamp the heel in operative position prior to the nail driving operation.

The lift support 6 is formed of thin resilient material, such as thin sheet metal, and is provided with nail passages 14, one for each of the drivers 4 the said passages being somewhat larger than the conduits 1.6 in the nail block. The lift support 6 is yieldingly attached to the head 18 of the machine by means of spring-pressed pins 20; The pins 20 extend respectively into recesses 22 formed in the head of the machine, and the upper ends of springs 24 arranged about the pins press against shoulders formed in the recesses, and the lower ends of the springs press against enlargements formed on the pins so that the heads 26 of the pins press the lift support 6 yieldingly against the head of the machine. WVith the above construction, should the drivers & accidentally come into contact with the lift support it will yield under their pressure by reason of its flexibility and also by reason of its being yiel'dingly held down in engagement with the head of the machine thus avoiding" breakage of the parts of the machine. The upper surface of the nail block being solid, except for the presence of the nail conduits, is adapted to sustain the lift support against the pressure it is subjected to when the work is clamped by the presser head upon said support.

Instead of the lift su port 6 being formed with a nail passage f dr each driver it is obvious that it can be formed in other ways. For example, an aperture in the shape of a heel might be provided sufficiently large to permit the passage of all the drivers. In this case the edges of the support would serve to sustain the heel lifts while they are being assembled and centered by the centering device. If desired, the lift support 6 may be provided with a slit. or slits to increase its flexibility.

t will. be noted in the construction shown that asv the downward pressure exerted by the presser head upon the'heel is resisted by the nail block the work support may be made very thin, it being only necessary that said support should have sufficient strength to support the heel lifts while they are being assembled thereon. By forming the work support of thin material the nail passages therein may be made larger than. the nail conduits in the nail block without interfering with the guiding of the nails into the work as said conduits serve to guide the nails throughout substantially their entire movement into the work. By having the passages in the work support larger than the conduits in the nail block, liability" of said passages becoming out of alinement with said conduits is avoided.

Having described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In a heel nailing machine, the combination with a nail block, mounted for movement between a nail receiving and a nail delivering position, and a presser member arranged for relative approaching movement, of a work support of thin material yielding in the direction of movement of the presser member and sustained between said parts in close proximity to said nail block.

2. A heel nailing machine, having in cornbination, a heel support, means for driving nails into the lifts assembled thereon including a nail block having drivers arranged therein and arranged to pass through said support, and means independent of the nail block for sustaining said support constructed to allow it to yield away from the nail block.

3. In a heel nailing machine, the combination of a nail block movable into and out of nail driving position and having nail guiding conduits, and a normally stationary yieldable lift support of thin sheet material having holes which register with the conduits in the nail block when the latter is in nail driving position, the said holes being larger than the said conduits, whereby slight inaccuracies in positioning the nail block will not prevent driving nails from the nail block into the heel.

4. A heel nailing machine, having combination, a nail block mounted for movement between a nail receiving and a nail driving position and" a work support comprising a thin flexible member arranged to support the work in close proximity to the upper surface of the nail block when the latter is in its nail driving position.

5. In a heel nailing machine, the combination of a nail block having nail guiding. conduits and a yieldable lift support of thin sheet material having holes arranged to register with the said conduits when the parts are in nail driving'position, the nail block and the lift support being relatively" movable into and out ofoperatime relation, and

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the holes in the lift support being substantially larger than the conduits in the nail block, whereby inaccurate register of the parts will not prevent properdriving of the nails into the heel.

6. A heel nailing machine, having in combination, a nail block mounted for movement between a nail receiving position and a nail driving position opposite the work, substantially stationary means for sustaining the work and a presser member for pressing the work toward the nail block, the said work sustainingmeans being thin and flexible to allow the pressure imparted to the work by the presser member to be resisted by the nail block.

7. In a machine of the class described, the combination of a nail blockprovided with nail conduits and a work support having nail passages larger in area than the conduits in the nail block, the Work support HARRY HALL.

Witnesses:

ARTHUR ERNEST J ERRAM, KATHERINE PEXTON.

Copies of this patent may be obtained for five cents each. by addressing the "Commissioner of Patents. Washington, D. 0-" 

